Many researchers have performed experiments to investigate
combustion and emission trends when using DME fuel in a diesel
engine. Most of which were based on using single-cylinder engines
and mechanical injection pumps [17–19]. However, for electronically
controlled DME fuel injection engines, supplying the DME to the
engine is not easy, because the evaporation characteristics of DME
differ from those of diesel, its lubricity is very low, and the properties
of DME fuel caused dissolving of the sealing material.